Pull Training Device

ABSTRACT

A pull training device is provided, including a pull grip, a cable having an end connected to the pull grip and a power module connected with the other end of the cable and can pull the cable. The power module includes a power input unit and a power output unit. The power input unit includes a motor and a cylinder combined with the motor in a torsional manner. The power output unit includes a rotating wheel and a winding shaft. The motor is connected to the rotating shaft of the rotating wheel. The cylinder is connected to spokes of the rotating wheel. The winding shaft is coaxial with the rotating shaft. The cable is coiled on the winding shaft. In a rotation circle of the rotating wheel driven by a pull, the torsion formed by the cylinder and motor together changes periodically, so the pull provided for training muscles is not a single source. The pull changes regularly in a circle, thus the muscles are trained a quick contraction and relaxation mode.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates to fitness equipment for muscle training, in particular to a pull training device which forms a tension system by combining two kinds of diving forces.

2. Description of Related Art

In professional training, muscles should be specifically trained to generate an explosive power and quick reaction. The explosive power depends on muscle strength transmission and muscle contraction speed. The method for increasing strength of the muscles is increasing the quantity of muscle fibers and enlarging the muscles, while the method for speeding up muscle contraction is different from the pure strength training mode and emphasizes on periodic change of the strength.

Two common types of traditional pull training equipment are available. One type is tension springs. The tension spring devices are stretched by pulling. As the devices are stretched, a bigger force is required. For example, the CN2032080 discloses an elastic all-around trainer comprised of a hook and an elastic chest expander as well as a plurality of rubber belts. The muscles are trained through pulling the device with arms. The other is adjustable rated-balance-weight lifting devices. For example, the CN 202136742 U discloses a forearm trainer. This forearm trainer adjusts the muscle training degree and strength through installing balance weights on the lifting device which generates a pull. The inherent weight of the balance weights are transmitted to the pull training handle through a steel cable. The process of applying a force is an anti-gravity working process. The number of balance weights on the lifting device is in proportional to the pull needed.

It is not hard to see from the pull configuration and output mode that the above two devices provide single pull sources. One is equidifferent weight gaining and the other is linear weight gaining Those two devices can only train the muscle strength in terms of pull, and fails to train the contraction and relaxation speed of the muscles in terms of muscle response.

BRIEF SUMMARY OF THE INVENTION

Aiming at the above-mentioned problems, the invention provides a pull training device capable of changing the pull in an action circle. The device can provide muscle strength training and muscle-contracting and—relaxing type reactive training in a circle.

The technical scheme of a pull training device of the invention is as follows. A pull training device comprises a pull grip, a cable having an end connected with the pull grip and a power module which is connected with the other end of the cable and can pull the cable. The power module includes a power input unit and a power output unit. The power input unit includes a motor and a cylinder combined with the motor in a torsional manner. The power output unit includes a rotating wheel and a winding shaft. The motor is connected to the rotating shaft of the rotating wheel. The cylinder is connected to spokes of the rotating wheel. The winding shaft is coaxial with the rotating shaft. The cable is coiled on the winding shaft.

The power input unit can be driven by the motor and the cylinder at the same time. The motor drives the power input unit by a rotating driving force at a constant speed, while the cylinder drives the power input unit by a periodically changing force.

The cylinder has a piston moving up and down. The piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the rotating wheel.

A pull training device comprises a pull grip, a cable having an end connected to the pull grip and a power module connected to the other end of the cable and can pull the cable. The power module includes a power input unit and a power output unit. The power input unit includes a motor, a cylinder combined with the motor in a torsional manner and a first rotating wheel. The moor is connected to the rotating shaft of the first rotating wheel. The cylinder is connected to the spokes of the first rotating wheel. The power output unit includes a second rotating wheel and a winding shaft. The winding shaft is coaxial with the second rotating shaft. The cable is coiled on the winding shaft. The first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt.

The transmission belt is a V-shaped transmission belt. The first rotating wheel and the second rotating wheel both have a V-shape belt trough.

The cylinder has a piston moving up and down. The piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the first rotating wheel.

A method for generating combined torsion in the pull training device is provided. The power input unit is driven by the motor and the cylinder at the same time. The motor drives the power input unit by a rotating driving force at a constant speed, while the cylinder drives the power input unit by a periodically changing force.

The pull training device comprises a pull grip, a cable having an end connected to the pull grip and a power module. The power module is connected with the other end of the cable and drives the cable. The power module includes a power input unit and a power output unit. The power input unit includes a first rotating wheel, a motor, and a cylinder combined with the motor in a torsional manner. The motor is connected to the rotating shaft of the first rotating wheel. The cylinder is connected to the spokes of the rotating wheel. The power output unit includes a second rotating wheel and a winding shaft. The winding shaft is coaxial with the second rotating shaft. The cable is coiled on the winding shaft. The first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt. The motor drives the rotating shaft of the first rotating wheel at a constant rotating speed, while the cylinder drives the spokes of the first rotating wheel by a periodically changing force.

The invention has the following beneficial effects: in a rotation circle of the rotating wheel driven by a pull, the torsion formed by the cylinder and motor together changes periodically, so the pull provided for training muscles is not a single source, but changes regularly. Muscles generate power to resist the periodically changing pull, thus fulfilling the aim of training and exercising the muscles. The device trains muscles in a quick contraction and relaxation mode.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a structural view of the pull training device in the first embodiment of the invention;

FIG. 2 is a structural view of the pull training device in the second embodiment of the invention;

FIG. 3 is a vertical view of FIG. 1;

FIG. 4 is a vertical view of FIG. 2.

Wherein: pull grip 10, 10′; cable 20, 20′; power input unit 31, 31′; motor 311, 311′; cylinder 312, 312′; first rotating wheel 313′; piston 3121; link rod 3122; power output unit 32, 32′; rotating wheel 321; the second rotating wheel 321′; winding wheel 322, 322′; transmission belt 33′.

DETAILED DESCRIPTION OF THE INVENTION Embodiment 1

Refer to FIG. 1, a pull training device comprises a pull grip 1, a cable 20 having an end connected with the pull grip 10 and a power module connected with the other end of the cable 20 and can pull the cable. The power module includes a power input unit 31 and a power output unit 32. The power input unit 31 includes a motor 311 and a cylinder 312 combined with the 311 motor in a torsional manner. The power output unit 32 includes a rotating wheel 321 and a winding shaft 322. The motor 311 is connected to the rotating shaft of the rotating wheel 321. The cylinder 312 is connected to spokes of the rotating wheel 321. The winding shaft 322 is coaxial with the rotating shaft 321. The cable 20 is coiled on the winding shaft 322.

The power input unit 31 is driven by the motor 311 and the cylinder 312 at the same time. The motor 311 drives the power input unit by a rotating driving force at a constant speed, meaning that the force input by the motor to the power input unit is constant, single, unchanged force. This driving force is fixed force. The cylinder 312 drives the power input unit 31 by a driving force that changes periodically. The cylinder 312 is provided with a piston 3121 moving up and down. The piston 3121 has a rotational rigid link rod 3122. One end of the link rod 3122 is rotationally connected to the piston 3121, while the other end is fixed at the spokes of the rotating wheel 321. The movable piston in the cylinder is provided with two extreme moving positions, namely a highest position and a lowest position, while the middle position is a balance position. When the piston moves downward from the highest position to the balance position, a directional force promoting the movement is called a first driving force; when the piston moves downward from the balance position to the lowest position, a directional force resisting the movement is called resistance; when the piston moves upward from the lowest position to the balance position, a directional force promoting the movement is called a second driving force; when the piston moves upward from the balance position to the highest position, a second resistance is generated. In such a way, the cylinder periodically provides a driving force that changes periodically to the power input unit 31.

Embodiment 2

Refer to FIG. 2, a pull training device is provided, different from the embodiment 1 in that: the power input unit 31′ includes a motor 311′, a cylinder 312′ combined with the motor 311′ in a torsional manner and a first rotating wheel 313′; the motor 311′ is connected to the rotating shaft of the first rotating wheel 313′; the cylinder 312′ is connected to the spokes of the first rotating wheel 313′; the power output unit 32′ comprises a second rotating shaft 321′ and a winding shaft 322′; the winding shaft 322′ is coaxial with the second rotating wheel 321′; the cable 20′ is coiled on the winding shaft 322′; the pull grip 10 is connected to the tail end of the cable 20; the first rotating wheel 313′ and the second rotating wheel 321′ transmit rotation there-between through a transmission belt 33′.

In this embodiment, an original rotating wheel is divided into two different rotating wheels, a first rotating wheel and a second rotating wheel. The first rotating wheel and the second rotating wheel respectively play the roles of the power input unit and the power output unit, while the two rotating wheels transmit rotation there-between through the transmission belt 33′. However, it can be clear that the transmission belt 33′ is not the only transmission part that can drive the two rotating wheels. Any transmission part that can transmit rotation between the two rotating wheels can be the substitute scheme.

Furthermore, the transmission belt 33′ is a V-shaped transmission belt. The first rotating wheel and the second rotating wheel both have a V-shape belt trough.

A method for generating combined torsion in the pull training device is provided. The power input unit is driven by the motor and the cylinder at the same time. The motor drives the power input unit by a rotating driving force at a constant speed, while the cylinder drives the power input unit by a periodically changing force.

In a rotation circle of the rotating wheel driven by a pull, the torsion formed by the cylinder and motor together changes periodically, so the pull provided for training muscles is not a single source, but changes regularly. Muscles generate power to resist the periodically changing pull to fulfill the aim of training and exercising the muscles. The device trains muscles in a quick contracting and relaxation mode.

The above embodiments are only preferable embodiments of the invention and cannot be regarded as limit on the invention in any form. Within the technical scheme scope of the invention, any skilled in those field may make equivalent changes or amendments according to the above disclosed technical contents. Any simple modifications, equivalent changes or amendments within the spirit of the technical scheme of the invention should belong to the protective scope of the technical scheme of the invention. 

What is claimed is:
 1. A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module which is connected with the other end of the cable and can pull the cable, characterized in that: the power module includes a power input unit and a power output unit; the power input unit includes a motor and a cylinder combined with the motor in a torsional manner; the power output unit includes a rotating wheel and a winding shaft; the motor is connected to the rotating shaft of the rotating wheel; the cylinder is connected to spokes of the rotating wheel; the winding shaft is coaxial with the rotating shaft; and the cable is coiled on the winding shaft; wherein, the motor provides the input unit with a constant driving force, while the cylinder provides the input unit with a driving force that changes periodically.
 2. A pull training device according to claim 1, characterized in that the cylinder has a piston moving up and down; the piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the rotating wheel.
 3. A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module which is connected with the other end of the cable and can pull the cable, characterized in that the power module includes a power input unit and a power output unit; the power input unit includes a motor, a cylinder combined with the motor in a torsional manner and a first rotating wheel; the motor is connected to the rotating shaft of the first rotating wheel; the cylinder is connected to the spokes of the first rotating wheel; the power output unit includes a second rotating wheel and a winding shaft; the winding shaft is coaxial with the second rotating shaft; the cable is coiled on the winding shaft; the first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt.
 4. A pull training device according to claim 3, characterized in that the transmission belt is a V-shape transmission belt. The first rotating wheel and the second rotating wheel have a V-shaped belt trough.
 5. A pull training device according to claim 3, characterized in that the cylinder has a piston moving up and down; the piston has a rotational rigid link rod; one end of the link rod is rotationally connected to the piston, while the other end is fixed at the spokes of the first rotating wheel.
 6. A method for generating combined torsion in the pull training device according to claim 3, characterized in that the power input unit is driven by the motor and the cylinder at the same time, the motor drives the power input unit by a rotating driving force at a constant speed, while the cylinder drives the power input unit by a periodically changing force.
 7. A pull training device, comprising a pull grip, a cable having an end connected to the pull grip and a power module, characterized in that the power module is connected with the other end of the cable and drives the cable; the power module includes a power input unit and a power output unit; the power input unit includes a first rotating wheel, a motor, and a cylinder combined with the motor in a torsional manner; the motor is connected to the rotating shaft of the first rotating wheel; the cylinder is connected to the spokes of the rotating wheel; the power output unit includes a second rotating wheel and a winding shaft; the winding shaft is coaxial with the second rotating shaft; the cable is coiled on the winding shaft; the first rotating wheel and the second rotating wheel transmit rotation there-between through a transmission belt; the motor drives the rotating shaft of the first rotating wheel at a constant rotating speed, while the cylinder drives the spokes of the first rotating wheel by a periodically changing force. 